Rotor core for an electric motor



FIG. 1 is a front view of a rotor core for an electric motor showing our new design, the rear view being a mirror image;

FIG. 2 is a top plan view thereof, the bottom plan being a mirror image;

FIG. 3 is a right side view thereof, the left side view being a mirror image; and,

FIG. 4 is a front and right side perspective view thereof. 

The ornamental design for a rotor core for an electric motor, as shown and described. 